Compression: H.264 main profile,4 channels CIF、HD1、D1 recording , 1 channels CIF、HD1、D1 playback.
4 channel real-time recording.
Embedded Linux system,Double MCU control.
Video input/output: 4 channels input & 4 channel output
Audio input/output: 4 channel input & 1 channel output (can be turned off) 
Record mode: real-time recording,move detection                           
Search mode : time ,date                                                           
Support 1pc hard disk recording, can be 1TB maximum.
1 channels playback at the same time.                          
Have Time-lapse turn off function, the time can be setted between 5-7200 seconds.
Wide Input Power Range :DC8-48V, anti-pulse voltage, low voltage protection.                    

4 channel sensor input、1 channel sensor output